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Ridiculously small Rigol DS1000z series font size
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marmad:

--- Quote from: markone on January 28, 2016, 05:58:07 pm ---Are you are wearing progressive lenses ?
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No, inside I just wear fixed-lens glasses - mostly a pair that works fairly well for a medium distance (50cm - a few meters) or sometimes stronger for reading at night. I also use extra magnification for PCB board  / precision work, etc. Like you, my vision was 20/20 until my 40's, so I didn't get used to glasses when young. It took a little while to get used to wearing a medium fixed inside, but now it's normal.

But I hate carrying glasses (especially more than one pair), so I wear bifocal contacts if I go out, which work well for driving, shopping, recreation, etc. They were really a revelation after struggling with forgetting to bring glasses, etc. after my vision first started getting bad (especially when my distance vision started to go).


--- Quote ---Your idea to remotely manage the scope was already applied years ago with some custom Labview program developed during the spare time with different DSO, but in a lot of cases i need a direct iteraction between board under test/development and instruments (scope, signal generator, spectrum analyzer and power supply), especially for power boards or rf devices (filter & LNA).

I worked some years in ATE development sector (late 80s, till middle of 90s), the gold era of GPIB & VXI chassis, i played a lot with remote instruments management till a point i started to hate that kind of approach, returning to pleasure to deal with display, knobs & buttons  :D

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Well, the software doesn't really have to control the scope per se (the SCPI commands are extremely easy to use), and the Rigol DS2000 (unlike the DS1000Z) doesn't allow the operation of the DSO to slow down regardless of how often you poll it for data. You only have to query variables (for example, VPP) and you get scientific notation back which can be shown on a large screen. Here is a screen cap of some simple software I wrote which displays any/all measurements of Ch1, Ch2, and Math - with as many decimal places and font size as needed.
markone:

--- Quote from: marmad on January 28, 2016, 06:56:16 pm ---No, inside I just wear fixed-lens glasses - mostly a pair that works fairly well for a medium distance (50cm - a few meters) or sometimes stronger for reading at night. I also use extra magnification for PCB board  / precision work, etc. Like you, my vision was 20/20 until my 40's, so I didn't get used to glasses when young. It took a little while to get used to wearing a medium fixed inside, but now it's normal.
--- End quote ---

Very same stroy here, i also found bifocal lens good for drive & recreation during the day, quite less during the night or low light, but useless to read, to work at PC or make precision works.


--- Quote from: marmad on January 28, 2016, 06:56:16 pm ---Well, the software doesn't really have to control the scope per se (the SCPI commands are extremely easy to use), and the Rigol DS2000 (unlike the DS1000Z) doesn't allow the operation of the DSO to slow down regardless of how often you poll it for data. You only have to query variables (for example, VPP) and you get scientific notation back which can be shown on a large screen. Here is a screen cap of some simple software I wrote which displays any/all measurements of Ch1, Ch2, and Math - with as many decimal places and font size as needed.

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Yep, i know quite well SCPI command philosophy, i wrote a lot of code using them (HP Basic first, then Quick Basic, Labview  from 1993) for ATE benches mainly with HP/Agilent instruments.

Just to have an idea, apart aggregate meas data query that i assume are lighting fast to accomplish, how much does it take to load the scope screen data buffer to PC memory?

I mean not the whole acquisition memory buffer, only the scope's screen traces data vectors (or in alternative decimated acquisition data buffer).

Is it possible to reach a remote real time (or near to) live screen on PC ?

I managed to do that easily with an Hantek usb DSO but i failed miserably with the old Rigol DS1022C, the USB interface throughput was obscenely low, dunno if things are changed with modern Rigol's DSO.

With "el cheapo" external DSO was possible to push its USB controller  (CY7C68013A) near to the limit of 2.0 standard, obtaining also nice real time FFT graphs, with Rigol i was reeeally far from that.
marmad:

--- Quote from: markone on January 28, 2016, 10:59:58 pm ---Just to have an idea, apart aggregate meas data query that i assume are lighting fast to accomplish, how much does it take to load the scope screen data buffer to PC memory?

I mean not the whole acquisition memory buffer, only the scope's screen traces data vectors (or in alternative decimated acquisition data buffer).

Is it possible to reach a remote real time (or near to) live screen on PC ?

--- End quote ---

Well, you certainly aren't going to get 50k wfrm/s like you do on the DSO screen.  ;)

But Rigol learned their lesson after the DS1000E series  - which I was able to glitch and crash spectacularly by asking for data too quickly - so the speed at which you can read the waveform is wholly dependent on the DSO - which will NEVER slow itself down or interrupt an important task to send data to the PC.

So it depends what you're doing with the scope and how many channels are on. On my PC, using a USB connection with a DS2000, I'm able to get a maximum of about 30 - 40 wfrm/s with a single channel on, and about 15 - 20 wfrm/s with two channels enabled in Normal mode (although I think my code can still be optimized more). You can see in the attached screen shot of my RUU software the FPS counter - it's showing about 13 wfrm/s with a single channel on while in Delayed Sweep mode (although my software is displaying the entire 256 values of the ADC for 10 vertical divisions - unlike the DSO which only does 200 values / 8 divisions).

But my tests using a DS1000Z (it was borrowed, so I don't have it anymore) showed that it was considerably slower in transferring data - in the single digit range of wfrm/s.
markone:

--- Quote from: marmad on January 28, 2016, 11:40:32 pm ---
Well, you certainly aren't going to get 50k wfrm/s like you do on the DSO screen.  ;)
--- End quote ---

Of course not ;D

30-60Fps would be enough,  if achievable with most scope setting.


--- Quote from: marmad on January 28, 2016, 11:40:32 pm ---So it depends what you're doing with the scope and how many channels are on. On my PC, using a USB connection with a DS2000, I'm able to get a maximum of about 30 - 40 wfrm/s with a single channel on, and about 15 - 20 wfrm/s with two channels enabled in Normal mode (although I think my code can still be optimized more). You can see in the attached screen shot of my RUU software the FPS counter - it's showing about 13 wfrm/s with a single channel on while in Delayed Sweep mode (although my software is displaying the entire 256 values of the ADC for 10 vertical divisions - unlike the DSO which only does 200 values / 8 divisions).

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Are we talking about mere DSO's screen trace's point vectors (ie 800 pt / ch with interpolation made on PC) or more complex data set ?

If positive the first one, the amount of data is quite small, in the order of some hundreds of KBytes/s for a complete screen @ 30FPS, the resulting bandwidth would be achievable also with the old USB 1.0 interface standard.

Of course it would be enough to implement a DSO working mode with slow (or disabled) internal screen update to achieve the task, transforming it in a luxury external USB DSO, but I can imagine that it is considered a swear word from the RIGOL's minds of marketing.


--- Quote from: marmad on January 28, 2016, 11:40:32 pm ---But my tests using a DS1000Z (it was borrowed, so I don't have it anymore) showed that it was considerably slower in transferring data - in the single digit range of wfrm/s.

--- End quote ---

Exactly what i was expecting ....

It seems that i have to take money out for a new scope with big fonts on the screen  |O

PS : Rigol Tech, if you are reading this, please implement a screen mode with NORMAL fonts for middle aged people !
rich:
Is using USB the only option or can the LAN be used and does it give better wfrms/s?

I guess intercepting the LCD connector and remoting it to HDMI/VGA/... for an external monitor is a step to far as a workaround for the font size ?
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